Timer on missions to tell you how long it will take to completion under current conditions. Similar to other incremental games, I.e. Kittens Game, this will allow for better time management and also make resource investment decisions easier.

Stopped playing in August after 16 months... never regretted it.
Whenever you think you are doing ok, servers will be merged and you get to compete against even more whales. I went through 3-4 merges and lost interest after that.
Also, micro transactions in this game are nuts.